The distance between City F and City G was 850 km apart. A lorry travelled at an average speed of 90 km/h from City F to City G. At the same time, a convertible travelled at an average speed of 80 km/h from City G to City F. How much further did the lorry travel than the convertible when the lorry met the convertible on the way?
Combined speed of the lorry and the convertible
= 90 + 80
= 170 km/h
Time taken for the lorry and the convertible to meet
= 850 ÷ 170
= 5 h
Difference in the speed between the lorry and the convertible
= 90 - 80
= 10 km/h
Distance that the lorry travelled further than the convertible
= 5 x 10
= 50 km
Answer(s): 50 km